PMID: 2498922Jan 1, 1989Paper

Relationship between behavioral and nociceptive changes in attacked mice: effects of opiate antagonists

Psychopharmacology
H R Frischknecht, B Siegfried

Abstract

The relationship between analgesia and behavior during and after an aggressive encounter was investigated in saline- and opiate antagonist-treated DBA mice. A low number of bites induced an analgesia that was reversed by beta-chlornaltrexamine but not by naloxone, and that correlated positively with increased displays of defensive upright and immobility upon contact with the opponent. Extended attacks induced a naloxone-sensitive analgesia that was linked to a delayed occurrence of "panic" escape behavior. In the post-conflict phase, the degree of immobility and analgesia correlated positively in attacked mice. Naltrexone prevented this analgesia and lowered immobility. Endogenous opioids released during social conflict may induce analgesia and immobility in DBA mice.

References

Jan 1, 1986·Physiology & Behavior·R J Rodgers, J I Randall
Sep 1, 1984·Behavioral and Neural Biology·B SiegfriedP G Waser
Mar 19, 1982·Science·K A MiczekL Shuster
Sep 1, 1982·Behavioural Processes·H R FrischknechtP G Waser

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Citations

Jul 1, 1993·Behavioral and Neural Biology·F R D'Amato, F Pavone
Nov 1, 1990·Peptides·G A OlsonA J Kastin
Mar 1, 1997·Pharmacology, Biochemistry, and Behavior·A Canto de SouzaF G Graeff
Jul 1, 1989·Behavioral and Neural Biology·B Siegfried, H R Frischknecht

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